Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Keantoken's CFP cap multiplier
Keantoken's CFP cap multiplier
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 7th May 2014, 02:20 PM   #701
buzzforb is offline buzzforb  United States
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
As i stated earlier, i replaced the BC337 this morning. Now both channels measure the same with the exception of the imbalance on one channel. It is small enought that I am proceeding. There is less than 1mV of ripple, so I am assuming all is well in the land of Oz.
__________________
...Shape the sound , Man!
  Reply With Quote
Old 7th May 2014, 04:10 PM   #702
alexkosha is offline alexkosha  United States
diyAudio Member
 
alexkosha's Avatar
 
Join Date: Jul 2013
Location: Boise, Idaho
Keantoken's CFP cap multiplier
I use another KM board for my J-Mo Mk II headphone amplifier.
Excellent results!
About 2V drop and it is feeding Salas BIB. Very clean power!
Attached Images
File Type: jpg Transformer.JPG (343.7 KB, 714 views)
File Type: jpg Rectifier.JPG (664.2 KB, 700 views)
File Type: jpg Oveview.jpg (688.7 KB, 670 views)
File Type: jpg One chenel.jpg (606.0 KB, 636 views)
File Type: jpg KM.JPG (595.5 KB, 617 views)
File Type: jpg GND.JPG (667.3 KB, 162 views)
File Type: jpg BIB.JPG (564.2 KB, 150 views)
  Reply With Quote
Old 8th May 2014, 04:57 AM   #703
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
Sounds good then Buzz, it looks like you are getting the benefits of the Kmultiplier even with the strange result. I would measure ripple again while under load to check if output impedance is okay.

Looks good Alex, I'm glad you like the result.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote
Old 10th May 2014, 04:18 PM   #704
tarcuper is offline tarcuper  Hungary
diyAudio Member
 
tarcuper's Avatar
 
Join Date: May 2005
Location: Budapest
Dear keantoken,
you have mentioned a three transistor design with less output impedance, I am very interesting in it. I have probed your design with BD140&BC337 and it works fine without parasitic oscillation, but if I want to have real low output impedance, it needs a lot of current.
Aim of circuit is the analog supply of a WM dac, it sounds better with very low impedance power supply. Have you any measurement data about noise increasing / decreasing? What is your opinion about this?
  Reply With Quote
Old 10th May 2014, 04:48 PM   #705
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
The BC3x7 is a very low-noise transistor. I don't expect the Kmultiplier to have much more noise than this transistor. The noise will be buried in ripple (~200uV-1mV) unless the input ripple is very low.

I have a 3-transistor version but I haven't tested it yet.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote
Old 17th May 2014, 06:17 AM   #706
Sunami is offline Sunami  Indonesia
diyAudio Member
 
Join Date: Dec 2010
Default KMultiplier for Preamp Power Supply

Hi Kean,

I would like to replace my PS Audio Preamp "Power Supply" with KMultiplier.

However I have some question :

1. Can I combine KMultiplier with LM-317 and LM-337 without effect to the
sound performance.

or possible to use trimmer in KMultiplier to adjust output voltage and
make same output voltage between positive section and negative section.

Please suggest your best solution.

Because my transformer 24 VAC, after rectifier and capacitor about 33 VDC.
Preamplifier need about 28 VDC.

2. Recommended Capacitor after output K-Multiplier.

3. What about snubber filter and bladder resistor.

Thank you for your help, I am beginner my question maybe funny.

Rgds,
Sun
  Reply With Quote
Old 19th May 2014, 12:29 AM   #707
Sunami is offline Sunami  Indonesia
diyAudio Member
 
Join Date: Dec 2010
Any advise below combination.
Rgds
Sun
Attached Images
File Type: jpg STeddy Comb.jpg (57.3 KB, 320 views)
  Reply With Quote
Old 19th May 2014, 02:22 AM   #708
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
Capacitors: I would use plain old Nichicon VR, because it is good and inexpensive. Many here prefer Panasonic FC for many of their projects so you may use that if you want.

Bleeder resistor: I would use a normal 6.8k after the KM for 28V.

Trimming: I suggest to increase R2 for the KM that has higher output voltage.

Snubber filter: What do you mean?

Your schematic will work. There should be at least one lytic near the output of the KM.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote
Old 19th May 2014, 08:59 AM   #709
Sunami is offline Sunami  Indonesia
diyAudio Member
 
Join Date: Dec 2010
Dear Kean,

Thanks and appreciated to your response.

Snubber Filter means C+R (10nF + 10R) after KM.

You mean by increase R2, I not need to use voltage regulator to have 28 VDC of output KM.

Rgds,
Sun
  Reply With Quote
Old 19th May 2014, 10:52 AM   #710
AndrewT is offline AndrewT  Scotland
R.I.P.
 
Join Date: Jul 2004
Location: Scottish Borders
Sun,
why regulator then Multiplier?

Usually we see Multiplier before the next circuit.
__________________
regards Andrew T.
  Reply With Quote

Reply


Keantoken's CFP cap multiplierHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Vbe multiplier - bypass cap Donk Solid State 7 22nd January 2008 01:55 AM
Question(s) about CFP. Justcallmedad Solid State 94 20th September 2005 10:08 AM
cap multiplier or not? PederBass Solid State 13 23rd March 2004 06:26 PM
Cap. multiplier or regulated supply ? Buhl Pass Labs 1 8th October 2003 10:51 PM


New To Site? Need Help?

All times are GMT. The time now is 10:05 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki